Light-emitting device

Abstract

To improve the luminance of light emitted by a light-emitting device, the light-emitting device includes a base ( 1 ) that has an opening part ( 1 p ) constituted by a light-reflecting surface ( 1 r ) and a bottom surface ( 1 u ), a light-emitting chip ( 2 ) that is mounted on the bottom surface ( 1 u ) of the opening part ( 1 p ), a transparent member ( 3 ) that covers the light-emitting chip ( 2 ), and an optical member ( 4 ) that is disposed on the transparent member ( 3 ). The transparent member ( 3 ) is disposed on the bottom surface ( 1 u ) of the opening part ( 1 p ) in a state where the transparent member ( 3 ) is spaced away from the light-reflecting surface ( 1 r ) of the opening part ( 1 p ).

The invention claim is:  
     
       1. A light-emitting device comprising:
 a base having an opening part which includes a light-reflecting surface and a bottom surface; 
 a light-emitting chip mounted on the bottom surface of the opening part; 
 a transparent member covering the light-emitting chip and disposed on the bottom surface of the opening part in a state where the transparent member is apart from the light-reflecting surface of the opening part; and 
 an optical member disposed on the transparent member, 
 wherein the transparent member surrounds a side surface and a top of the light-emitting chip, 
 wherein the transparent member has a larger thickness on a side of the side surface of the light-emitting chip than a thickness on a side of the top of the light-emitting chip. 
 
     
     
       2. A light-emitting device comprising:
 a base having an opening part which includes a light-reflecting surface and a bottom surface; 
 a light-emitting chip mounted on the bottom surface of the opening part; 
 a transparent member covering the light-emitting chip and disposed on the bottom surface of the opening part in a state where the transparent member is apart from the light-reflecting surface of the opening part; and 
 an optical member disposed on the transparent member, 
 wherein the transparent member surrounds a side surface and a top of the light-emitting chip, 
 wherein a light emitted from the side surface of the light-emitting chip travels in a light-emitting direction by the transparent member. 
 
     
     
       3. A light-emitting device comprising:
 a base having an opening part which includes a light-reflecting surface and a bottom surface; 
 a light-emitting chip mounted on the bottom surface of the opening part; 
 a transparent member covering the light-emitting chip and disposed on the bottom surface of the opening part in a state where the transparent member is apart from the light-reflecting surface of the opening part; and 
 an optical member disposed on the transparent member, 
 wherein the transparent member surrounds a side surface and a top of the light-emitting chip, 
 wherein the transparent member has a side surface and an upper surface adhering to the optical member, 
 wherein the side surface of the transparent member guides a light emitted from the side surface of the light-emitting chip by total reflection in a light-emitting direction. 
 
     
     
       4. A light-emitting device comprising:
 a base having an opening part which includes a light-reflecting surface and a bottom surface; 
 a light-emitting chip mounted on the bottom surface of the opening part; 
 a transparent member covering the light-emitting chip and disposed on the bottom surface of the opening part in a state where the transparent member is apart from the light-reflecting surface of the opening part, 
 an optical member disposed on the transparent member; and 
 a wavelength converter covering the optical member, 
 wherein the wavelength converter has a dome shape. 
 
     
     
       5. The light-emitting device according to  claim 4 , wherein the optical member has a dome-shaped upper surface attached to the wave length converter. 
     
     
       6. A light-emitting device comprising:
 a base; 
 a light-emitting chip mounted on the base; 
 a transparent member disposed on the base and covering the light-emitting chip; 
 an optical member disposed on the transparent member; and 
 a wavelength converter disposed on the base and covering the optical member and the transparent member, the wavelength converter surrounding the transparent member via a transparent layer which is interposed between the wavelength converter and the transparent member and which has a refractive index smaller than the transparent member. 
 
     
     
       7. The light-emitting device according to  claim 6 , wherein
 the wavelength converter has a dome shape, and 
 the optical member has a dome-shaped upper surface adhered to the wavelength converter. 
 
     
     
       8. The light-emitting device according to  claim 6 , wherein The transparent layer is an air layer. 
     
     
       9. The light-emitting device according to  claim 6 , wherein the transparent layer is made of a resin material.